The land line phones in United States are managed by Level 3 Communications. An individual code consisting of the phone exchange code and area code is assigned for each constituent of a city in United States. Austin, Texas has 512 assigned to it. You can use the exchange code and area code to find out crucial information about that particular area in the United States. For doing so, you can use the latitude and longitude which in turn correspond to the 30.19861 and -97.71359 to find out the particular area on the map.